Logic Need recommend the "intelligent" file formats like Gerber X2 file format over the old formats (Gerber RS-274X artwork files / Excellon drilling files) to ensure superior manufacturability, quality, reliability and consistency.

1-	Open your PCB Design file on Altium Designer software, check integrity of the files. Here we used the file name "MyPCB.PcbDoc " as an example file.  Select the menu "File", then left-click "Fabrication Outputs",  and select "Gerber X2 Files"
2-	In the "Gerber X2 Setup' dialog, in the "Layers To Plot" tab follow and select the parameters as shown here: (We use a light-green colored blocks for marking the required selections)
3-	Then Click the "Drills" Tab,  follow and select the parameters as shown and finally click "OK" button.
4-	The Gerber X2 files will be exported to the location defined in the Output Path field, on the Options tab of the Project Options dialog.(by default the same location as your design files) It will be named using the *.gbr extention.   Place ALL the exported *.gbr files into an archive file (ZIP or RAR). Now, you are done. (We recommend that you give the files a quick check using any Gerber viewer software or online Gerber Viewer before confirming the order)

▪	For more information about Gerber X2 file format  [click here]